scholarly journals Efecto de la aplicación de bioestimulantes sobre la calidad y capacidad antioxidante de frutos de calabacita (Cucurbita pepo L. var. ‘Grey Zucchini’)

2020 ◽  
Vol 38 (1) ◽  
pp. 17
Author(s):  
Lluvia de Abril Alexandra Soriano-Melgar ◽  
Humberto Izquierdo-Oviedo ◽  
Yvette Alessandra Saucedo-Espinosa ◽  
Antonio Cárdenas-Flores
Keyword(s):  
Vitamin C ◽  
Antioxidant Capacity ◽  
Cucurbita Pepo ◽  
Agricultural Research ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Organoleptic Characteristics ◽  
Dry Biomass

Nowadays, agricultural research has not been only focused on studying the effect of different treatments on plant development and yield, but it has also been involved on study their effect on the postharvest quality of products. This study was conducted to determine the treatment effect based on plant growth-promoting rhizobacteria (Azotobacter chroococcum), alone or combined with different oligosaccharins of pectic origin (Pectimorf®) or derivatives of chitosan (Quitomax®), on the postharvest quality of zucchini fruits (Cucurbita pepo L.) var. 'Grey Zucchini'. Physical characteristics (polar and equatorial diameter, weight, dry biomass, f irmness, and color) and chemical characteristics (pH, total soluble solids, treatable acidity and vitamin C), proteins, antioxidant enzymatic activities (superoxide dismutase, catalase and total peroxidase), polyphenol oxidase activity, and antioxidant content (phenolic compounds and antioxidant capacity) were evaluated. Results showed significant differences (P ≤ 0.05) between control and treatments in most of the parameters evaluated, such as: color, length (up to 15.88%), width (up to 16.25%), weight (up to 57.31%), dry biomass (up to 34.43%), pH (down to 9.72%), vitamin C (up to 162.6%) and protein content (up to 22.38%), and total antioxidant capacity (down to 18.72%). Therefore, plant treatments improved the quality and composition of postharvest fruits, which accentuates the importance of organic treatments during the development of plants to obtain fruits with better organoleptic characteristics.

scholarly journals Influence of the main stem pruning and fruit thinning on quality of melon

Revista CERES ◽  
2016 ◽  
Vol 63 (6) ◽  
pp. 789-795
Author(s):  
Rafaella Martins de Araújo Ferreira ◽  
Edna Maria Mendes Aroucha ◽  
Cristiane Alves de Paiva ◽  
José Francismar de Medeiros ◽  
Flavinicíus Pereira Barreto
Keyword(s):  
Vitamin C ◽  
Management Practices ◽  
Fruit Size ◽  
Titratable Acidity ◽  
Main Stem ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Fruit Thinning ◽  
Flesh Firmness

ABSTRACT Among many management practices used in melon crops, those that change source: sink relationship, such as pruning and fruit thinning, directly influence production, affect fruit size and its composition, including sugar and vitamin contents. The objective of this study was to evaluate the influence of pruning of the main stem and time of fruit thinning in melon postharvest quality. Thus, two experiments were set up in Mossoró, state of Rio Grande do Norte, each with a melon hybrid (Amaregal and Banzai). Each experiment was conducted in a randomized block, in a (2 x 4) + 1 factorial design, 2 pruning management (with and without pruning), 4 levels of fruit thinning (3, 6, 9 and 12 DARB - days after removal agro textile blanket) and a control (without pruning and thinning), and four replications. Fruits were harvested at commercial maturity and transported to the Laboratory of Food Technology of UFERSA, where they were evaluated for the following characteristics: weight, diameter, length, flesh thickness, flesh firmness, soluble solids, pH, and titratable acidity, soluble solids: titratable acidity ratio and vitamin C. No interaction between factors in any of the experiments was found. Titratable acidity (0.077%) and vitamin C content (3.4 mg/100 g) in Amaregal melon and soluble solids (10.2%) in Banzai melon were lower in the treatments with stem pruning. In Amaregal melon, fruits showed longer length (134 mm) and greater flesh firmness (40 N) when thinning was carried out on 6 DARB, and as thinning was delayed, it found a decrease in the values of soluble solids, SS: TA ratio and pH. In Banzai melon, fruits showed greater flesh thickness (33.5 mm) and SS: TA (247.5) ratio when thinning was carried out on 6 DARB. However, delay in thinning promoted an increase in pH and vitamin C content of the fruits. Pruning of the main stem and thinning season had effect on the quality of Amaregal and Banzai melons in different ways.

scholarly journals Effects of Biostimulants on Annurca Fruit Quality and Potential Nutraceutical Compounds at Harvest and during Storage

Plants ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 775 ◽  
Author(s):  
Giulia Graziani ◽  
Alberto Ritieni ◽  
Aurora Cirillo ◽  
Danilo Cice ◽  
Claudio Di Vaio
Keyword(s):  
Antioxidant Capacity ◽  
Cold Storage ◽  
Foliar Application ◽  
Protein Hydrolysate ◽  
Quality Parameters ◽  
Soluble Solids ◽  
Nutraceutical Compounds ◽  
Organoleptic Characteristics

The cultivar Annurca is an apple that is cultivated in southern Italy that undergoes a typical redding treatment and it is appreciated for organoleptic characteristics, high pulp firmness, and nutritional profile. In this study, the effects of three different biostimulants (Micro-algae (MA), Protein hydrolysate (PEP), and Macro-algae mixed with zinc and potassium (LG)), with foliar application, on the quality parameters of Annurca apple fruits at the harvest, after redding, and at +60 and +120 days of cold storage were analyzed: total soluble solids (TSS) content, total acidity (TA), pH, firmness flesh, and red coloration of epicarp. Additionally, the polyphenolic quali-quantitative profile of pulp and peel was analyzed by UHPLC-Q-Orbitrap HRMS and Folin-Ciocalteu and the antioxidant capacity with the methods 1,1-diphenyl-2-picrylhydrazyl (DPPH) and ferric-reducing antioxidant capacity (FRAP). The results obtained suggest that biostimulants are involved in the regulation of the secondary metabolism of the treated plants, acting positively on the quality of the Annurca fruits and their nutritional value. Fruits treated with PEP have shown, during cold storage, a significantly higher content of total polyphenols in flesh and a higher concentration of phloretin xylo-glucoside and phloridzin (350.53 and 43.58 mg/kg dw respectively). MA treatment caused, at the same time, an enhancement of flavonols between 0.6–28% and showed the highest total polyphenol content in the peel after 60 and 120 days of cold storage, with 2696.048 and 2570.457 mg/kg dw, respectively. The long-term cold storage (120 days) satisfactorily maintained phenolic content of fruits deriving from MA and PEP application, in accordance with data that were obtained for peel, showed an increase of 7.8 and 5.8%, respectively, when compared to the fruits cold stored for 60 days. This study represents the first detailed research on the use of different types of biostimulants on the quality of the Annurca apple from harvest to storage.

scholarly journals QUALITY OF ACEROLA (Malpighia emarginata) TREATED WITH GIBBERELIC ACID AND STORED UNDER REFRIGERATION

2017 ◽  
Vol 39 (4) ◽  
Author(s):  
KELLINA OLIVEIRA DE SOUZA ◽  
CARLOS FARLEY HERBSTER MOURA ◽  
MÔNICA MARIA DE ALMEIDA LOPES ◽  
MARCELA CRISTINA RABELO ◽  
MARIA RAQUEL ALCÂNTARA DE MIRANDA
Keyword(s):  
Vitamin C ◽  
Skin Color ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Red Color ◽  
Malpighia Emarginata ◽  
Gibberelic Acid ◽  
Control Water

ABSTRACT The goal of this study was study the postharvest quality of acerola clone BRS 236 (Malpighia emarginata D.C.) which was harvested at physiological maturity and submitted to four treatments under immersion during 5 minutes at 25 °C, which are: control (water), 60 mg L-1; 120 mg L-1 and 180 mg L-1. After treatment the fruits were packed in polystyrene trays and placed with polyethylene film and then stored at 10 ± 2 °C and 85 ± 5% RH for 12 days. Were analyzed in three days intervals (0, 3, 6, 9 and 12 days): skin color, firmness, pH, titratable acidity, soluble solids, SS/TA ratio, vitamin C and yellow flavonoids. Vitamin C, anthocyanins and yellow flavonoids were not influenced by treatments with GA3 at the end of 12-day of cold storage at 10 ºC. The exogenous application of 120 mg L-1 of GA3 resulted in retention of red color and content of anthocyanins of acerola fruits BRS 236 clone 12-day storage at 10 °C.

scholarly journals Storage Temperature Influences Postharvest Quality of Wild Plum (Ximmenia Americana L.) Fruit

2019 ◽  
Vol 60 (2) ◽  
pp. 1-10
Author(s):  
V. E. Emongor ◽  
G. Ramagonono
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Storage Temperature ◽  
Chilling Injury ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Soluble Solids Content ◽  
Solids Content

Wild plum has many medicinal, therapeutic and nutritive uses, but its fruits are collected in the wild and less researched. The aim of this study was to evaluate the effects of storage tem­perature on postharvest fruit quality of wild plum. The fruits of wild plum were subjected to different storage treatments at 0, 5, 10 and 15 ± 1°C in a completely randomized design. The results showed that as storage temperature decreased below 15°C, the incidence and severity of chilling injury significantly (p<0.05) increased. As storage temperature increased from 0 to 15°C fruit titratable acidity (TTA) and vitamin C content significantly (p< 0.05) decreased, but juice pH, soluble solids content (SSC) and weight loss significantly (p< 0.05) increased. The decrease in TTA and vitamin C content, and increase in SSC and juice pH was attributed to fruit ripening. The increase in fruit weight loss was attributed to higher transpiration and respiration. It was concluded that to extend the storage-life and marketing period of wild plum fruits, the fruits should be stored at 15°C and 90-95% RH. Keywords: Ximenia americana, Chilling injury and incidence, Vitamin C, Soluble solids content, Acidity

scholarly journals Improvement of Postharvest Quality of Plum (Prunus domestica L.) Using Polysaccharide-Based Edible Coatings

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1148 ◽  
Author(s):  
Sima Panahirad ◽  
Rahim Naghshiband-Hassani ◽  
Sara Bergin ◽  
Ramesh Katam ◽  
Nasser Mahna
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Antioxidant Capacity ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Edible Coatings ◽  
Coating Application ◽  
Positive Effects ◽  
Preservation Method

Polysaccharide-based edible coatings are served as an attractive preservation method for postharvest maintenance of most fruits. The current study examined the effect of carboxymethylcellulose (CMC)- and pectin (Pec)-based edible coatings on titratable acidity (TA), firmness; vitamin C (vit C); total soluble solids (TSS); pH; total phenolics; anthocyanin and flavonoid contents; total antioxidant capacity (based on 1,1-Diphenyl-2-picryl-hydrazyl hydrate (DPPH)); the activities of peroxidase (POD), polyphenol oxidase (PPO) and polygalacturonase (PG) enzymes; and weight loss during cold storage. The results showed that each coating and their combinations caused positive effects in all measured parameters except weight loss. The applied coatings preserved firmness and improved total phenols, anthocyanin and flavonoid contents, antioxidant capacity and POD activity. In addition, TSS decreased and pH values remained more or less stable with the coating application. The coatings delayed TA and vitamin C loss, and decreased enzymatic activities such as PPO and PG. It could be stated that CMC at 1% and Pec at 1.5% separately demonstrated the best results for most of the measured parameters; and 0.5% Pec + 1.5% CMC could be considered as the best combination. In conclusion, application of CMC, Pec, or their combinations would be considered as an interesting approach to improve postharvest quality characteristics of plum fruit.

scholarly journals Potassium and growth-promoting fungi improve the postharvest quality of grape tomato

2022 ◽  
Vol 43 (2) ◽  
pp. 675-692
Author(s):  
Deise Silva Castro Pimentel Cardoso Cardoso ◽  
◽  
Herminia Emilia Prieto Martinez ◽  
Ariana Mota Pereira ◽  
Maria Catarina Megumi Kasuya ◽  
...  
Keyword(s):  
Vitamin C ◽  
Titratable Acidity ◽  
Fruit Production ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Tomato Plants ◽  
Randomized Design ◽  
Growth Promoting ◽  
Low K

Tomato plants respond well to potassium fertilization, whose insufficiency leads to a drop in fruit production and quality. On the other hand, the association of growth-promoting fungi (GPF) with roots has been shown to be able to optimize nutrient absorption, which implies lower financial costs and a decreased risk of loss of K applied to the soil. The objective of this study was to investigate the effects of inoculation with GPF and K rates on the postharvest quality of grape tomato hybrid ‘Mascot’ grown in a hydroponic system. The plants were cultivated in a hydroponic drip system using washed and sterilized sand as substrate. They were trained with two stems, leaving three bunches per stem. The experiment was carried out in a splitsplit-plot arrangement in a completely randomized design with three replicates. Ripe fruits were stored for 30 days in PET containers in storage chambers at a temperature of 25 °C. After 0, 10, 20 and 30 days of storage, five fruits were collected to determine the titratable acidity (TA) and soluble solids (SS), reducing sugars (RS) and vitamin C contents. The K rates provided an increase in the quality attributes. At low K rates, inoculation with GPF led to higher TA, SS, RS and vitamin C values. Inoculation of the plants with GPF improved the postharvest preservation of the fruits, especially when the plants underwent nutritional stress during cultivation.

scholarly journals Effect of Chitosan/Nano-TiO2 Composite Coating on the Postharvest Quality of Blueberry Fruit

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 512
Author(s):  
Yage Xing ◽  
Shuang Yang ◽  
Qinglian Xu ◽  
Lin Xu ◽  
Dan Zhu ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Composite Coating ◽  
Combined Treatment ◽  
Edible Coating ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Total Phenolic ◽  
Microbiological Analysis ◽  
Nano Tio2

Blueberries are a rich source of health-promoting compounds such as vitamins and anthocyanins and show a high antioxidant capacity. Thus, considerable commercial and scientific interest exists in prolonging its postharvest life to meet the year-round demand for this fruit. In this investigation, the effect of a chitosan-based edible coating, as well as a chitosan-based edible coating containing nanosized titanium dioxide particles (CTS-TiO2), on the postharvest quality of blueberry fruit quality was evaluated during storage at 0 °C. The blueberries were treated with a chitosan coating (CTS) and a CTS-TiO2 composite, respectively. The most suitable chitosan and nano-TiO2 fraction concentrations to be incorporated in the coating formulation were prepared based on the wettability of the corresponding coating solutions. Changes in firmness, total soluble solids (TSS), titratable acidity (TA), ascorbic acid (VC), malondialdehyde (MDA), polyphenol oxidase (PPO), and peroxidase (POD) activities, anthocyanins, flavonoids, total phenolic content, and microbiological analysis were measured and compared. This combined treatment prevented product corruption. Compared with CTS, the CTS-TiO2 composite coating application effectively slowed down the decrease in firmness, TSS, VC, and TA in the blueberries. Additionally, changes in the total polyphenol, anthocyanin, and flavonoid contents and the antioxidant capacity of CTS-TiO2 composite coating blueberry fruits were delayed. Therefore, these results indicated that the chitosan/nano-TiO2 composite coating could maintain the nutrient composition of blueberries while playing a significant role in preserving the quality of fruit at 0 °C.

scholarly journals Postharvest quality of tomato as affected by nitrogen and sulfur interaction

2020 ◽  
Vol 69 (2) ◽  
pp. 130-135
Author(s):  
Matias Siueia Júnior ◽  
Maria Ligia de Souza Silva ◽  
Anderson Ricardo Trevizam ◽  
Valdemar Faquin ◽  
Deivisson Ferreira da Silva
Keyword(s):  
Vitamin C ◽  
Fruit Quality ◽  
Tomato Fruit ◽  
Beta Carotene ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Solanum Lycopersicum L ◽  
Randomized Design

Nitrogen (N) and sulfur (S) are nutrients that, in addition to influencing plant growth and production, interfere with processes related to postharvest fruit quality. In the present study, N x S interaction was evaluated in the postharvest quality of tomato (Solanum lycopersicum L.). The experiment was conducted in a greenhouse using 5 dm3 capacity vessels containing a 0-20 cm layer of a dystropherric Red Latosol. A 5 x 3 factorial design was used, with combinations of five doses of N (0, 100, 200, 300 and 400 mg dm-3) and three doses of S (0, 60 and 120 mg dm-3) distributed in a completely randomized design, with four repetitions. After harvest, the attributes of fruit quality were evaluated: firmness, pH, soluble solids (SS), titratable acidity (AT), soluble solids ratio and titratable acidity (SS / AT), vitamin C, lycopene and beta-carotene. An increase in firmness was observed, as well as the content of soluble solids, titratable acidity and the SS / AT ratio of the fruits as a result of the interaction N x S. However, this interaction favoured the reduction of the contents of vitamin C, lycopene and beta-carotene, and the quality characteristics of tomato fruit in relation to the recommended values. Only the increasing doses of N favoured a higher pH in the tomato fruits.

scholarly journals Impact of High-Pressure Homogenization Parameters on Physicochemical Characteristics, Bioactive Compounds Content, and Antioxidant Capacity of Blackcurrant Juice

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1802
Author(s):  
Bartosz Kruszewski ◽  
Katarzyna Zawada ◽  
Piotr Karpiński
Keyword(s):  
High Pressure ◽  
Vitamin C ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Titratable Acidity ◽  
Physicochemical Characteristics ◽  
Food Preservation ◽  
Inlet Temperature ◽  
High Pressure Homogenization

High-pressure homogenization (HPH) is one of the food-processing methods being tested for use in food preservation as an alternative to pasteurization. The effects of the HPH process on food can vary depending on the process parameters used and product characteristics. The study aimed to investigate the effect of pressure, the number of passes, and the inlet temperature of HPH processing on the quality of cloudy blackcurrant juice as an example of food rich in bioactive compounds. For this purpose, the HPH treatment (pressure of 50, 150, and 220 MPa; one, three, and five passes; inlet temperature at 4 and 20 °C) and the pasteurization of the juice were performed. Titratable acidity, pH, turbidity, anthocyanin, vitamin C, and total phenolics content, as well as colour, and antioxidant activity were measured. Heat treatment significantly decreased the quality of the juice. For processing of the juice, the best were the combinations of the following: one pass, the inlet temperature of 4 °C, any of the used pressures (50, 150, and 220 MPa); and one pass, the inlet temperature of 20 °C, and the pressure of 150 MPa. Vitamin C and anthocyanin degradation have been reported during the HPH. The multiple passes of the juice through the machine were only beneficial in increasing the antioxidant capacity but negatively affected the colour stability.

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